diff --git a/clippy_dev/src/lib.rs b/clippy_dev/src/lib.rs
index e70488165b99b..3a8b070d73516 100644
--- a/clippy_dev/src/lib.rs
+++ b/clippy_dev/src/lib.rs
@@ -1,5 +1,5 @@
+#![feature(lazy_cell)]
 #![feature(let_chains)]
-#![feature(once_cell)]
 #![feature(rustc_private)]
 #![cfg_attr(feature = "deny-warnings", deny(warnings))]
 // warn on lints, that are included in `rust-lang/rust`s bootstrap
diff --git a/clippy_lints/src/lib.rs b/clippy_lints/src/lib.rs
index 82d63ddca6d7b..b14cd36a04cd7 100644
--- a/clippy_lints/src/lib.rs
+++ b/clippy_lints/src/lib.rs
@@ -7,7 +7,6 @@
 #![feature(let_chains)]
 #![feature(lint_reasons)]
 #![feature(never_type)]
-#![feature(once_cell)]
 #![feature(rustc_private)]
 #![feature(stmt_expr_attributes)]
 #![recursion_limit = "512"]
diff --git a/clippy_lints/src/needless_pass_by_value.rs b/clippy_lints/src/needless_pass_by_value.rs
index 1ab81aee7b8d5..327e090d38be8 100644
--- a/clippy_lints/src/needless_pass_by_value.rs
+++ b/clippy_lints/src/needless_pass_by_value.rs
@@ -124,9 +124,9 @@ impl<'tcx> LateLintPass<'tcx> for NeedlessPassByValue {
 
         let preds = traits::elaborate_predicates(cx.tcx, cx.param_env.caller_bounds().iter())
             .filter(|p| !p.is_global())
-            .filter_map(|obligation| {
+            .filter_map(|pred| {
                 // Note that we do not want to deal with qualified predicates here.
-                match obligation.predicate.kind().no_bound_vars() {
+                match pred.kind().no_bound_vars() {
                     Some(ty::PredicateKind::Clause(ty::Clause::Trait(pred))) if pred.def_id() != sized_trait => {
                         Some(pred)
                     },
diff --git a/clippy_lints/src/redundant_static_lifetimes.rs b/clippy_lints/src/redundant_static_lifetimes.rs
index 44bf824aa0e2d..038dfe8e4803c 100644
--- a/clippy_lints/src/redundant_static_lifetimes.rs
+++ b/clippy_lints/src/redundant_static_lifetimes.rs
@@ -1,7 +1,7 @@
 use clippy_utils::diagnostics::span_lint_and_then;
 use clippy_utils::msrvs::{self, Msrv};
 use clippy_utils::source::snippet;
-use rustc_ast::ast::{Item, ItemKind, Ty, TyKind};
+use rustc_ast::ast::{ConstItem, Item, ItemKind, StaticItem, Ty, TyKind};
 use rustc_errors::Applicability;
 use rustc_lint::{EarlyContext, EarlyLintPass};
 use rustc_session::{declare_tool_lint, impl_lint_pass};
@@ -100,13 +100,13 @@ impl EarlyLintPass for RedundantStaticLifetimes {
         }
 
         if !item.span.from_expansion() {
-            if let ItemKind::Const(_, ref var_type, _) = item.kind {
+            if let ItemKind::Const(box ConstItem { ty: ref var_type, .. }) = item.kind {
                 Self::visit_type(var_type, cx, "constants have by default a `'static` lifetime");
                 // Don't check associated consts because `'static` cannot be elided on those (issue
                 // #2438)
             }
 
-            if let ItemKind::Static(ref var_type, _, _) = item.kind {
+            if let ItemKind::Static(box StaticItem { ty: ref var_type, .. }) = item.kind {
                 Self::visit_type(var_type, cx, "statics have by default a `'static` lifetime");
             }
         }
diff --git a/clippy_lints/src/ref_option_ref.rs b/clippy_lints/src/ref_option_ref.rs
index 448a32b77c036..c984a8286eb88 100644
--- a/clippy_lints/src/ref_option_ref.rs
+++ b/clippy_lints/src/ref_option_ref.rs
@@ -3,7 +3,7 @@ use clippy_utils::last_path_segment;
 use clippy_utils::source::snippet;
 use if_chain::if_chain;
 use rustc_errors::Applicability;
-use rustc_hir::{GenericArg, Mutability, Ty, TyKind};
+use rustc_hir::{GenericArg, GenericArgsParentheses, Mutability, Ty, TyKind};
 use rustc_lint::{LateContext, LateLintPass};
 use rustc_session::{declare_lint_pass, declare_tool_lint};
 use rustc_span::symbol::sym;
@@ -47,7 +47,7 @@ impl<'tcx> LateLintPass<'tcx> for RefOptionRef {
 
             if cx.tcx.is_diagnostic_item(sym::Option, def_id);
             if let Some(params) = last_path_segment(qpath).args ;
-            if !params.parenthesized;
+            if params.parenthesized == GenericArgsParentheses::No;
             if let Some(inner_ty) = params.args.iter().find_map(|arg| match arg {
                 GenericArg::Type(inner_ty) => Some(inner_ty),
                 _ => None,
diff --git a/clippy_lints/src/suspicious_operation_groupings.rs b/clippy_lints/src/suspicious_operation_groupings.rs
index 8aa47b62ebff4..fab8e9c2ec1c1 100644
--- a/clippy_lints/src/suspicious_operation_groupings.rs
+++ b/clippy_lints/src/suspicious_operation_groupings.rs
@@ -578,7 +578,7 @@ fn ident_difference_expr_with_base_location(
         | (Assign(_, _, _), Assign(_, _, _))
         | (TryBlock(_), TryBlock(_))
         | (Await(_), Await(_))
-        | (Async(_, _, _), Async(_, _, _))
+        | (Async(_, _), Async(_, _))
         | (Block(_, _), Block(_, _))
         | (Closure(_), Closure(_))
         | (Match(_, _), Match(_, _))
diff --git a/clippy_lints/src/types/borrowed_box.rs b/clippy_lints/src/types/borrowed_box.rs
index 65dfe7637ea99..acdf54710691e 100644
--- a/clippy_lints/src/types/borrowed_box.rs
+++ b/clippy_lints/src/types/borrowed_box.rs
@@ -20,7 +20,7 @@ pub(super) fn check(cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, lt: &Lifetime, m
                 if let QPath::Resolved(None, path) = *qpath;
                 if let [ref bx] = *path.segments;
                 if let Some(params) = bx.args;
-                if !params.parenthesized;
+                if params.parenthesized == hir::GenericArgsParentheses::No;
                 if let Some(inner) = params.args.iter().find_map(|arg| match arg {
                     GenericArg::Type(ty) => Some(ty),
                     _ => None,
diff --git a/clippy_lints/src/types/utils.rs b/clippy_lints/src/types/utils.rs
index 7f43b7841ff33..a30748db88fc9 100644
--- a/clippy_lints/src/types/utils.rs
+++ b/clippy_lints/src/types/utils.rs
@@ -1,6 +1,6 @@
 use clippy_utils::last_path_segment;
 use if_chain::if_chain;
-use rustc_hir::{GenericArg, QPath, TyKind};
+use rustc_hir::{GenericArg, GenericArgsParentheses, QPath, TyKind};
 use rustc_lint::LateContext;
 use rustc_span::source_map::Span;
 
@@ -8,7 +8,7 @@ pub(super) fn match_borrows_parameter(_cx: &LateContext<'_>, qpath: &QPath<'_>)
     let last = last_path_segment(qpath);
     if_chain! {
         if let Some(params) = last.args;
-        if !params.parenthesized;
+        if params.parenthesized == GenericArgsParentheses::No;
         if let Some(ty) = params.args.iter().find_map(|arg| match arg {
             GenericArg::Type(ty) => Some(ty),
             _ => None,
diff --git a/clippy_lints/src/use_self.rs b/clippy_lints/src/use_self.rs
index 8ea5475fb2527..5a02987453c41 100644
--- a/clippy_lints/src/use_self.rs
+++ b/clippy_lints/src/use_self.rs
@@ -10,8 +10,8 @@ use rustc_hir::{
     def::{CtorOf, DefKind, Res},
     def_id::LocalDefId,
     intravisit::{walk_inf, walk_ty, Visitor},
-    Expr, ExprKind, FnRetTy, FnSig, GenericArg, GenericParam, GenericParamKind, HirId, Impl, ImplItemKind, Item,
-    ItemKind, Pat, PatKind, Path, QPath, Ty, TyKind,
+    Expr, ExprKind, FnRetTy, FnSig, GenericArg, GenericArgsParentheses, GenericParam, GenericParamKind, HirId, Impl,
+    ImplItemKind, Item, ItemKind, Pat, PatKind, Path, QPath, Ty, TyKind,
 };
 use rustc_hir_analysis::hir_ty_to_ty;
 use rustc_lint::{LateContext, LateLintPass};
@@ -100,7 +100,8 @@ impl<'tcx> LateLintPass<'tcx> for UseSelf {
             if let TyKind::Path(QPath::Resolved(_, item_path)) = self_ty.kind;
             let parameters = &item_path.segments.last().expect(SEGMENTS_MSG).args;
             if parameters.as_ref().map_or(true, |params| {
-                !params.parenthesized && !params.args.iter().any(|arg| matches!(arg, GenericArg::Lifetime(_)))
+                params.parenthesized  == GenericArgsParentheses::No
+                    && !params.args.iter().any(|arg| matches!(arg, GenericArg::Lifetime(_)))
             });
             if !item.span.from_expansion();
             if !is_from_proc_macro(cx, item); // expensive, should be last check
diff --git a/clippy_utils/src/ast_utils.rs b/clippy_utils/src/ast_utils.rs
index 809d654603a69..1f15598db36d9 100644
--- a/clippy_utils/src/ast_utils.rs
+++ b/clippy_utils/src/ast_utils.rs
@@ -209,7 +209,7 @@ pub fn eq_expr(l: &Expr, r: &Expr) -> bool {
                 && eq_fn_decl(lf, rf)
                 && eq_expr(le, re)
         },
-        (Async(lc, _, lb), Async(rc, _, rb)) => lc == rc && eq_block(lb, rb),
+        (Async(lc, lb), Async(rc, rb)) => lc == rc && eq_block(lb, rb),
         (Range(lf, lt, ll), Range(rf, rt, rl)) => ll == rl && eq_expr_opt(lf, rf) && eq_expr_opt(lt, rt),
         (AddrOf(lbk, lm, le), AddrOf(rbk, rm, re)) => lbk == rbk && lm == rm && eq_expr(le, re),
         (Path(lq, lp), Path(rq, rp)) => both(lq, rq, eq_qself) && eq_path(lp, rp),
@@ -286,8 +286,30 @@ pub fn eq_item_kind(l: &ItemKind, r: &ItemKind) -> bool {
     match (l, r) {
         (ExternCrate(l), ExternCrate(r)) => l == r,
         (Use(l), Use(r)) => eq_use_tree(l, r),
-        (Static(lt, lm, le), Static(rt, rm, re)) => lm == rm && eq_ty(lt, rt) && eq_expr_opt(le, re),
-        (Const(ld, lt, le), Const(rd, rt, re)) => eq_defaultness(*ld, *rd) && eq_ty(lt, rt) && eq_expr_opt(le, re),
+        (
+            Static(box ast::StaticItem {
+                ty: lt,
+                mutability: lm,
+                expr: le,
+            }),
+            Static(box ast::StaticItem {
+                ty: rt,
+                mutability: rm,
+                expr: re,
+            }),
+        ) => lm == rm && eq_ty(lt, rt) && eq_expr_opt(le, re),
+        (
+            Const(box ast::ConstItem {
+                defaultness: ld,
+                ty: lt,
+                expr: le,
+            }),
+            Const(box ast::ConstItem {
+                defaultness: rd,
+                ty: rt,
+                expr: re,
+            }),
+        ) => eq_defaultness(*ld, *rd) && eq_ty(lt, rt) && eq_expr_opt(le, re),
         (
             Fn(box ast::Fn {
                 defaultness: ld,
@@ -451,7 +473,18 @@ pub fn eq_foreign_item_kind(l: &ForeignItemKind, r: &ForeignItemKind) -> bool {
 pub fn eq_assoc_item_kind(l: &AssocItemKind, r: &AssocItemKind) -> bool {
     use AssocItemKind::*;
     match (l, r) {
-        (Const(ld, lt, le), Const(rd, rt, re)) => eq_defaultness(*ld, *rd) && eq_ty(lt, rt) && eq_expr_opt(le, re),
+        (
+            Const(box ast::ConstItem {
+                defaultness: ld,
+                ty: lt,
+                expr: le,
+            }),
+            Const(box ast::ConstItem {
+                defaultness: rd,
+                ty: rt,
+                expr: re,
+            }),
+        ) => eq_defaultness(*ld, *rd) && eq_ty(lt, rt) && eq_expr_opt(le, re),
         (
             Fn(box ast::Fn {
                 defaultness: ld,
diff --git a/clippy_utils/src/hir_utils.rs b/clippy_utils/src/hir_utils.rs
index 3a6d23ca5c102..3ee7147828bd5 100644
--- a/clippy_utils/src/hir_utils.rs
+++ b/clippy_utils/src/hir_utils.rs
@@ -401,14 +401,9 @@ impl HirEqInterExpr<'_, '_, '_> {
     }
 
     fn eq_path_parameters(&mut self, left: &GenericArgs<'_>, right: &GenericArgs<'_>) -> bool {
-        if !(left.parenthesized || right.parenthesized) {
+        if left.parenthesized == right.parenthesized {
             over(left.args, right.args, |l, r| self.eq_generic_arg(l, r)) // FIXME(flip1995): may not work
                 && over(left.bindings, right.bindings, |l, r| self.eq_type_binding(l, r))
-        } else if left.parenthesized && right.parenthesized {
-            over(left.inputs(), right.inputs(), |l, r| self.eq_ty(l, r))
-                && both(&Some(&left.bindings[0].ty()), &Some(&right.bindings[0].ty()), |l, r| {
-                    self.eq_ty(l, r)
-                })
         } else {
             false
         }
diff --git a/clippy_utils/src/lib.rs b/clippy_utils/src/lib.rs
index f4af00599cd26..f1d2ae220f81d 100644
--- a/clippy_utils/src/lib.rs
+++ b/clippy_utils/src/lib.rs
@@ -3,7 +3,6 @@
 #![feature(let_chains)]
 #![feature(lint_reasons)]
 #![feature(never_type)]
-#![feature(once_cell)]
 #![feature(rustc_private)]
 #![recursion_limit = "512"]
 #![cfg_attr(feature = "deny-warnings", deny(warnings))]
@@ -2168,9 +2167,7 @@ pub fn fn_has_unsatisfiable_preds(cx: &LateContext<'_>, did: DefId) -> bool {
         .filter_map(|(p, _)| if p.is_global() { Some(*p) } else { None });
     traits::impossible_predicates(
         cx.tcx,
-        traits::elaborate_predicates(cx.tcx, predicates)
-            .map(|o| o.predicate)
-            .collect::<Vec<_>>(),
+        traits::elaborate_predicates(cx.tcx, predicates).collect::<Vec<_>>(),
     )
 }
 
diff --git a/rust-toolchain b/rust-toolchain
index 0b2458ea00708..91e8ccea1f434 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2023-03-24"
+channel = "nightly-2023-04-06"
 components = ["cargo", "llvm-tools", "rust-src", "rust-std", "rustc", "rustc-dev", "rustfmt"]
diff --git a/src/driver.rs b/src/driver.rs
index 39f2bf9aa1998..718bc41fb9924 100644
--- a/src/driver.rs
+++ b/src/driver.rs
@@ -1,6 +1,6 @@
 #![feature(rustc_private)]
 #![feature(let_chains)]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![feature(lint_reasons)]
 #![cfg_attr(feature = "deny-warnings", deny(warnings))]
 // warn on lints, that are included in `rust-lang/rust`s bootstrap
diff --git a/tests/compile-test.rs b/tests/compile-test.rs
index c10ee969c0146..57890ff31737b 100644
--- a/tests/compile-test.rs
+++ b/tests/compile-test.rs
@@ -1,5 +1,5 @@
 #![feature(test)] // compiletest_rs requires this attribute
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![feature(is_sorted)]
 #![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![warn(rust_2018_idioms, unused_lifetimes)]
diff --git a/tests/dogfood.rs b/tests/dogfood.rs
index 3a5d478fa3140..68a878e9a3d31 100644
--- a/tests/dogfood.rs
+++ b/tests/dogfood.rs
@@ -3,7 +3,7 @@
 //!
 //! See [Eating your own dog food](https://en.wikipedia.org/wiki/Eating_your_own_dog_food) for context
 
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![warn(rust_2018_idioms, unused_lifetimes)]
 
diff --git a/tests/lint_message_convention.rs b/tests/lint_message_convention.rs
index abd0d1bc5934f..8feea800fdbe3 100644
--- a/tests/lint_message_convention.rs
+++ b/tests/lint_message_convention.rs
@@ -1,4 +1,4 @@
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![cfg_attr(feature = "deny-warnings", deny(warnings))]
 #![warn(rust_2018_idioms, unused_lifetimes)]
 
diff --git a/tests/ui/crashes/ice-6254.stderr b/tests/ui/crashes/ice-6254.stderr
index 22d82a30c6aad..263c27d3d646a 100644
--- a/tests/ui/crashes/ice-6254.stderr
+++ b/tests/ui/crashes/ice-6254.stderr
@@ -6,6 +6,8 @@ LL |         FOO_REF_REF => {},
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #62411 <https://github.com/rust-lang/rust/issues/62411>
+   = note: the traits must be derived, manual `impl`s are not sufficient
+   = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details
    = note: `-D indirect-structural-match` implied by `-D warnings`
 
 error: aborting due to previous error
diff --git a/tests/workspace.rs b/tests/workspace.rs
index 95325e0603782..c9cbc50546cf3 100644
--- a/tests/workspace.rs
+++ b/tests/workspace.rs
@@ -1,4 +1,4 @@
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 
 use std::path::PathBuf;
 use std::process::Command;